Power tool

Abstract

The application discloses a power tool, comprising: a casing with a convex rib and a locking groove; a battery assembly comprising a shell and a locking piece slidingly installed on the shell, the shell being provided with a sliding groove and a clamping groove; a first elastic piece installed on the casing; an elastic positioning piece rotationally installed on the casing, the elastic positioning piece comprising a clamping portion and an abutting portion, the first elastic piece being clamped between the abutting portion and the casing; in a locking state, the convex rib is connected in the sliding groove to limit the movement of the battery assembly relative to the casing in Y and Z directions, the locking piece is inserted into the locking groove, and the locking piece abuts against the abutting portion. The power tool can reduce the abrasion of the battery assembly and the casing and the poor contact between the electric connectors in the battery assembly and the casing due to vibration, and can avoid the falling of the battery assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of electric tools, and in particular to an electric tool. Background Art

[0002] Power tools usually include a detachable battery pack and casing. Currently, power tools on the market mainly rely on the battery pack ribs, lock tongue and casing ribs for positioning and fixing. The above-mentioned battery pack positioning and fixing structure has no buffer structure. On power tool products with large vibration (such as electric hammers and electric picks), the battery pack lock tongue and casing are easily worn, and the battery pack may even fall off; if the battery pack vibrates violently, the conductivity between the battery pack slot and the battery connection board plug will be poor, and the slot / plug will be easily worn.

[0003] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0004] An object of the present invention is to provide an electric tool that can reduce wear of a battery assembly and a housing.

[0005] To achieve the above objectives, an embodiment of the present invention provides an electric tool, comprising:

[0006] The housing has a rib and a locking groove;

[0007] The battery assembly includes a housing and a locking member slidably mounted on the housing, wherein the housing has a slide groove and a locking groove;

[0008] a first elastic member, mounted on the housing;

[0009] an elastic positioning member rotatably mounted on the housing, the elastic positioning member comprising a clamping portion and a resisting portion, the first elastic member being clamped between the resisting portion and the housing;

[0010] In the locked state, the rib is connected to the slide groove to limit the movement of the battery assembly relative to the housing in the Y direction and the Z direction, and the locking member is plugged into the locking groove to limit the movement of the battery assembly relative to the housing in the X direction; the locking member abuts against the holding portion to rotate the elastic positioning member, and the first elastic member is elastically deformed under the action of the holding portion, so that the clamping portion abuts against the clamping groove, generating a force that limits the movement of the battery assembly relative to the housing along the X direction and the Y direction.

[0011] In one or more embodiments of the present invention, the holding portion is formed by bending and extending from one end of the resisting portion.

[0012] In one or more embodiments of the present invention, one end of the clamping portion is bent and extended to form an abutting portion, and the abutting portion has an abutting surface;

[0013] In a locked state, the holding portion abuts against the bottom of the slot, and the abutting surface abuts against the side wall of the slot.

[0014] In one or more embodiments of the present invention, the elastic positioning member further includes a connecting portion connected to the holding portion or the holding portion, and the connecting portion is rotatably connected to the housing.

[0015] In one or more embodiments of the present invention, a rotating pin is installed on the housing, the connecting portion has a positioning hole, and the rotating pin is rotatably connected to the positioning hole so that the connecting portion is rotatably connected to the housing.

[0016] In one or more embodiments of the present invention, the housing has a limiting surface;

[0017] In the unlocked state, the first elastic member causes the abutting portion to abut against the limiting surface, and the clamping portion is separated from the clamping slot.

[0018] In one or more embodiments of the present invention, the locking member includes a button portion for pressing and a locking tongue portion for abutting against the abutting portion.

[0019] In one or more embodiments of the present invention, a second elastic member is mounted on the housing, and the second elastic member is held between the locking member and the housing.

[0020] In the locked state, the locking member abuts against the abutting portion under the action of the second elastic member; the elastic restoring force of the second elastic member is greater than the elastic restoring force of the first elastic member.

[0021] In one or more embodiments of the present invention, the housing has a through hole.

[0022] In a locked state, the locking piece protrudes out of the through hole and abuts against the abutting portion.

[0023] In one or more embodiments of the present invention, the housing has a limiting hole for accommodating the first elastic member.

[0024] Compared to the prior art, the power tool according to the embodiment of the present invention, when the locking member is inserted into the locking slot, it abuts against the abutting portion of the elastic positioning member, driving the elastic positioning member to rotate, causing the retaining portion on the elastic positioning member to abut against the retaining portion in the slot, generating a force that restricts the movement of the battery assembly relative to the housing in the X and Y directions, thereby assisting in positioning the battery assembly. Because the elastic positioning member itself has a certain degree of elasticity, it reduces vibration-induced wear on the battery assembly and the housing, as well as poor contact between the battery assembly and the electrical connector in the housing, in the X and Y directions, thereby preventing the battery assembly from falling off. Furthermore, when the elastic positioning member rotates, the abutting portion drives the first elastic member to undergo elastic deformation. Leveraging the elasticity of the first elastic member, the retaining portion reduces vibration-induced wear on the battery assembly and the housing, as well as poor contact between the battery assembly and the electrical connector in the housing, in the Z direction, thereby preventing the battery assembly from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an exploded view of some parts of a power tool according to one embodiment of the present invention;

[0026] Figure 2 is a schematic diagram of a battery assembly according to one embodiment of the present invention;

[0027] Figure 3 is a schematic diagram of an elastic positioning member according to an embodiment of the present invention;

[0028] Figure 4 is a partial cross-sectional view of an electric tool according to an embodiment of the present invention;

[0029] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0030] Figure 6 is a partial cross-sectional view of an electric tool according to an embodiment of the present invention;

[0031] Figure 7 yes Figure 6 Enlarged view of point B in the middle;

[0032] Figure 8 is a partial cross-sectional view of an electric tool according to an embodiment of the present invention;

[0033] Figure 9 yes Figure 8 Enlarged view of point C in the middle.

[0034] Description of main reference numerals:

[0035] 1. Casing; 11. Raised rib; 12. Locking groove; 13. Left shell; 14. Right shell; 15. Limiting hole; 16. Limiting surface; 2. Battery assembly; 21. Shell; 211. Slide groove; 212. Slot; 22. Locking member; 221. Lock tongue portion; 222. Button portion; 2211. Guide surface; 23. Second elastic member; 3. First elastic member; 4. Elastic positioning member; 41. Holding portion; 42. Holding portion; 43. Connecting portion; 431. Positioning hole; 44. Abutting portion; 441. Abutting surface; 5. Rotation pin DETAILED DESCRIPTION

[0036] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0037] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations such as "include" or "comprising", etc., will be understood to include the stated elements or components but not to exclude other elements or other components.

[0038] like Figures 1 to 3 As shown, the electric tool according to a preferred embodiment of the present invention includes a housing 1, a battery assembly 2, a first elastic member 3 and an elastic positioning member 4; the housing 1 has a rib 11 and a locking groove 12; the battery assembly 2 includes a shell 21 and a locking member 22 slidably mounted on the shell 21, and the shell 21 has a slide groove 211 and a clamping groove 212; the first elastic member 3 is mounted on the housing 1; the elastic positioning member 4 is rotatably mounted on the housing 1, and the elastic positioning member 4 includes a holding portion 41 and a supporting portion 42, and the first elastic member 3 is clamped between the supporting portion 42 and the housing 1.

[0039] In the locked state, the rib 11 is connected to the slide groove 211 to limit the movement of the battery assembly 2 relative to the housing 1 in the Y direction and the Z direction. The locking member 22 is inserted into the locking groove 12 to limit the movement of the battery assembly 2 relative to the housing 1 in the X direction; the locking member 22 abuts against the supporting portion 42, causing the elastic positioning member 4 to rotate. The first elastic member 3 is elastically deformed under the action of the supporting portion 42, causing the clamping portion 41 to abut against the clamping groove 212, generating a force that limits the movement of the battery assembly 2 relative to the housing 1 along the X direction and the Y direction.

[0040] It can be understood that the elastic positioning member 4 can be a spring with a certain elasticity, such as a spring made of metal material. The present invention utilizes the elasticity of the elastic positioning member 4 itself, thereby achieving a shock-absorbing effect on the battery assembly 2 and the housing 1 in the X and Y directions; the elastic deformation direction of the first elastic member 3 can be the Z direction, thereby achieving a shock-absorbing effect on the battery assembly 2 and the housing 1 in the Z direction. Therefore, through the cooperation of the first elastic member 3 and the elastic positioning member 4, the battery assembly 2 can be assisted in positioning and buffering and shock-absorbing in the X, Y, and Z directions during the installation process, thereby reducing the wear between the battery assembly 2 and the housing 1, preventing the battery assembly 2 from falling off, and reducing or avoiding the poor contact and wear between the battery assembly 2 and the electrical connector in the housing 1 caused by the vibration of the battery assembly 2. The X, Y, and Z directions in the present invention can refer to Figure 2 The X, Y, and Z directions in .

[0041] It should be noted that the prior art utilizes battery pack ribs, a lock tongue, and housing ribs for positioning and locking, which is equivalent to the present invention's embodiment of the ribs 11 and locking grooves 12 on the housing 1 cooperating with the locking member 22 on the battery assembly 2 and the slide groove 211 on the housing 21, respectively, to achieve locking. During the use of an electric tool (such as an electric hammer or pickaxe), severe vibrations are generated, which are transmitted from the housing 1 to the battery assembly 2, causing wear between the locking member 22 and the locking groove 12, as well as poor contact and wear between the battery assembly 2 and the electrical connector in the housing 1. Therefore, the present invention reduces vibrations transmitted from the housing 1 to the battery assembly 2 by adding a first elastic and elastic positioning member 4 to the housing 1 and providing a locking groove 212 on the housing 21, thereby reducing or avoiding poor contact and wear between the battery assembly 2 and the electrical connector in the housing 1. It also serves to position the battery assembly 2 and the housing 1 during assembly. That is, the present invention adds a first elastic and elastic positioning member 4 in the casing 1 and opens a card slot 212 on the shell 21. Through the cooperation of the above structures, it can simultaneously play a role in positioning the battery assembly 2 and the casing 1 during the assembly process, reduce the vibration transmitted to the battery assembly 2 by the casing 1, reduce the wear between the locking member 22 and the locking slot 12, and reduce or avoid the occurrence of poor contact, wear and other phenomena between the battery assembly 2 and the electrical connector in the casing 1.

[0042] like Figure 1 and Figure 2As shown, in one embodiment, the housing 1 can be assembled from a left housing 13 and a right housing 14. Each of the left and right housings 13 and 14 has a rib 11, and each side of the housing 21 can also have a slide groove 211. The slide grooves 211 correspond to the ribs 11 one-to-one. When the ribs 11 on the left and right housings 13 and 14 are slidably inserted into the corresponding slide grooves 211, the battery assembly 2 can be restricted from moving relative to the housing 1 in the Y direction.

[0043] Specifically, the left shell 13 and the right shell 14 can be detachably connected by screws and nuts.

[0044] It is understandable that the locking groove 12 can also be considered as being partially provided on the left shell 13 and the other part provided on the right shell 14 . When the left shell 13 and the right shell 14 are assembled, a complete locking groove 12 is formed.

[0045] Specifically, the housing 1 has a limiting hole 15 for accommodating the first elastic member 3 , and a portion of the first elastic member 3 is installed in the limiting hole 15 , thereby limiting and guiding the deformation direction of the first elastic member 3 .

[0046] Furthermore, the first elastic member 3 may be a compression spring.

[0047] like Figure 3 As shown, in a specific embodiment, the holding portion 41 is bent and extended from one end of the supporting portion 42. Such a configuration reduces the distance between the holding portion 41 and the slot 212, thereby reducing the rotation angle of the elastic positioning member 4, making it easier for the holding portion 41 to resist the slot 212.

[0048] Furthermore, one end of the retaining portion 41 is bent and extended to form an abutting portion 44, which has an abutting surface 441. In the locked state, the retaining portion 41 abuts against the bottom of the retaining slot 212, and the abutting surface 441 abuts against the sidewall of the retaining slot 212. This arrangement increases the contact area between the elastic positioning member 4 and the retaining slot 212, thereby increasing the force that restricts the movement of the battery assembly 2 relative to the housing 1 in the X direction.

[0049] In one embodiment, the elastic positioning member 4 further includes a connecting portion 43 connected to the clamping portion 41 or the clamping portion 41, and the connecting portion 43 is rotatably connected to the housing 1. The rotatable connection between the elastic positioning member 4 and the housing 1 is achieved through the connecting portion 43.

[0050] Further, such as Figure 1 and Figure 3As shown, a rotating pin 5 is mounted on the housing 1, and the connecting portion 43 has a positioning hole 431. The rotating pin 5 is rotatably connected to the positioning hole 431, so that the connecting portion 43 is rotatably connected to the housing 1. The two ends of the rotating pin 5 can be mounted on the left housing 13 and the right housing 14 respectively, and the left housing 13 and the right housing 14 can each have a hole for inserting or installing the rotating pin 5.

[0051] Specifically, the rotating pin 5 can be considered to be an interference fit with the holes on the left shell 13 and the right shell 14, or the outer diameter of the rotating pin 5 is the same as the aperture of the holes on the left shell 13 and the right shell 14, or the outer diameter of the rotating pin 5 is slightly smaller than the aperture of the holes on the left shell 13 and the right shell 14, that is, the rotating pin 5 can be fixedly installed on the shell 21, or the rotating pin 5 can be rotatably installed on the shell 21.

[0052] In such Figure 3 In the illustrated embodiment, the positioning hole 431 may be formed by bending the connecting portion 43 ; in other embodiments, the positioning hole 431 may also be a hole directly opened on the connecting portion 43 .

[0053] In such Figure 3 In the illustrated embodiment, the elastic positioning member 4 may include two connecting portions 43 , and the two connecting portions 43 are provided on both sides of the supporting portion 42 . Such an arrangement can enhance the connection strength between the connecting portion 43 and the rotating pin 5 .

[0054] like Figure 5 As shown, in one embodiment, the housing 1 has a limiting surface 16; in the unlocked state, the first elastic member 3 causes the abutting portion 42 to abut against the limiting surface 16, and the clamping portion 41 is separated from the clamping slot 212. In the unlocked state, the limiting surface 16 can limit the rotational position of the abutting portion 42, so that the abutting portion 42 cooperates with the housing 1 to clamp the first elastic member 3, preventing the abutting portion 42 from rotating too far, resulting in the first elastic member 3 being unable to clamp the first elastic member 3 and falling off the housing 1.

[0055] like Figures 6 to 9 As shown, in one embodiment, the locking member 22 includes a button portion 222 for pressing and a lock tongue portion 221 for abutting against the abutting portion 42. The button portion 222 is connected to the abutting portion 42, and by pressing the button portion 222, the lock tongue portion 221 is driven to move along the Z direction, that is, the position of the lock tongue portion 221 along the Z direction is controlled.

[0056] It is understood that the locking member 22 is slidably mounted on the housing 21, and the locking tongue portion 221 has a guiding surface 2211. When the battery assembly 2 is plugged into the housing 1, the guiding surface 2211 contacts the housing 1. The guiding surface 2211 converts the X-direction force applied by the housing 1 into a Z-direction force, thereby causing the locking tongue portion 221 to move along the Z-direction toward the inside of the housing 21. During the actual installation process, the locking tongue portion 221 can also be moved along the Z-direction toward the inside of the housing 21 by pressing the button portion 222.

[0057] like Figures 6-9 As shown, in one embodiment, a second elastic member 23 is mounted on the housing 21. The second elastic member 23 abuts between the locking member 22 and the housing 21. In the locked state, the locking member 22 abuts against the abutting portion 44 under the action of the second elastic member 23. The second elastic member 23 drives the locking tongue portion 221 in the Y direction to move in the Z direction toward the outside of the housing 21.

[0058] Specifically, the second elastic member 23 can be a compression spring, mounted on the housing 21. The locking member 22 can be partially inserted into the compression spring, acting as a position limiter for the compression spring. In the locked state, the locking member abuts against the abutment portion under the action of the second elastic member. The elastic restoring force of the second elastic member is greater than that of the first elastic member, thereby achieving the aforementioned effect.

[0059] Specifically, the housing 21 has a through hole, and in the locked state, the locking member 22 protrudes out of the through hole and abuts against the abutting portion 44. The through hole can limit the movement direction of the locking tongue portion 221.

[0060] In a specific embodiment, the battery assembly 2 may further include a battery and a controller module installed in the housing 21 .

[0061] like Figure 4 and Figure 5 As shown, at this point, the left and right shells 13 and 14 of the housing 1 are also assembled. At this point, the abutting portion 42 of the elastic positioning member 4 abuts against the limiting surface 16 of the housing 1 under the action of the first elastic member 3. The elastic positioning member 4 is rotatably connected to the housing 1 via the rotating pin 5, thereby completing the installation of the first elastic member 3, the elastic positioning member 4, and the rotating pin 5 on the housing 1.

[0062] like Figure 6 and Figure 7 As shown, the battery assembly 2 is plugged into the housing 1. At this time, under the action of external force, the button portion 222 moves downward and drives the lock tongue portion 221 to move downward. The lock tongue portion 221 is separated from the locking groove 12 and the supporting portion 42. At this time, the holding portion 41 of the elastic positioning member 4 is not inserted into the slot 212. At this time, the battery assembly 2 can slide freely relative to the housing 1 along the X direction.

[0063] like Figure 8 and Figure 9 As shown, the force acting on the locking member 22 is removed, and the locking member 22 returns to its original position under the action of the second elastic member 23. At this time, the lock tongue portion 221 is inserted into the locking groove 12 and abuts against the abutting portion 42, driving the abutting portion 42 to move upward along the Z direction, compressing the first elastic member 3. The elastic positioning member 4 rotates, and the holding portion 41 is inserted into the card slot 212 and abuts against the bottom of the card slot 212. The abutting surface 441 on the abutting portion 44 abuts against the side wall of the card slot 212. At this time, since the elastic positioning member 4 itself has a certain elasticity, the battery assembly 2 is brought into a relatively balanced state under the cooperation of the elastic positioning member 4 and the card slot 212. During the operation of the power tool, the vibration transmitted from the housing 1 to the battery assembly 2 can be balanced or eliminated by the elastic positioning member 4, or the vibration transmitted from the housing 1 to the battery assembly 2 can be balanced or eliminated by the cooperation of the elastic positioning member 4 and the first elastic member 3.

[0064] like Figure 8 and Figure 9 As shown, since the abutting surface 441 on the abutting portion 44 abuts against the side wall of the slot 212, when the power tool is in use, if the battery assembly 2 moves to the left along the X direction relative to the housing 1, the abutting portion 44 can give the battery assembly 2 a reverse thrust to the right, thereby reducing the contact force and friction between the locking tongue portion 221 and the housing 1, thereby preventing the battery assembly 2 and the housing 1 from separating.

[0065] In summary, the beneficial effects of the electric tool of the present invention are:

[0066] (1) During the installation process, it plays an auxiliary role in positioning and buffering the battery components in the X, Y, and Z directions.

[0067] (2) Reduce the wear between the battery pack and the housing to prevent the battery pack from falling off.

[0068] (3) Reduce or avoid poor contact and wear between the battery assembly and the electrical connector in the housing caused by vibration of the battery assembly.

[0069] (4) The structure is reliable, the process is simple and the cost is low, the positioning is reliable, and the assembly and maintenance are easy. It can be applied to platform-based and universal products.

[0070] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to realize and utilize a variety of exemplary embodiments of the invention and various options and modifications. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. An electric tool, characterized in that: include: A housing (1) having a rib (11) and a locking groove (12), wherein the housing (1) comprises a left housing (13) and a right housing (14); A battery assembly (2) comprises a housing (21) and a locking member (22) slidably mounted on the housing (21), wherein the housing (21) has a sliding groove (211) and a locking groove (212); A first elastic member (3) is mounted on the housing (1); An elastic positioning member (4) is rotatably mounted on the housing (1), the elastic positioning member (4) comprising a clamping portion (41) and a resisting portion (42), and the first elastic member (3) is clamped between the resisting portion (42) and the housing (1); In the locked state, the rib (11) is connected to the slide groove (211) to limit the movement of the battery assembly (2) relative to the housing (1) in the Y direction and the Z direction, and the locking member (22) is plugged into the locking groove (12) to limit the movement of the battery assembly (2) relative to the housing (1) in the X direction; the locking member (22) abuts against the abutting portion (42), causing the elastic positioning member (4) to rotate, and the first elastic member (3) undergoes elastic deformation under the action of the abutting portion (42), causing the clamping portion (41) to abut against the clamping groove (212), thereby generating a force that limits the movement of the battery assembly (2) relative to the housing (1) along the X direction and the Y direction.

2. The electric tool according to claim 1, wherein: The clamping portion (41) is formed by bending and extending from one end of the resisting portion (42).

3. The electric tool according to claim 1, wherein: One end of the clamping portion (41) is bent and extended to form an abutting portion (44), and the abutting portion (44) has an abutting surface (441); In the locked state, the holding portion (41) abuts against the bottom of the card slot (212), and the abutting surface (441) abuts against the side wall of the card slot (212).

4. The electric tool according to claim 1, wherein: The elastic positioning member (4) further includes a connecting portion (43) connected to the clamping portion (41) or the clamping portion (41), and the connecting portion (43) is rotatably connected to the housing (1).

5. The electric tool according to claim 4, wherein: A rotating pin (5) is mounted on the housing (1), the connecting portion (43) has a positioning hole (431), and the rotating pin (5) is rotatably connected to the positioning hole (431) so that the connecting portion (43) is rotatably connected to the housing (1).

6. The electric tool according to claim 1, wherein: The housing (1) has a limiting surface (16); In the unlocked state, the first elastic member (3) causes the abutting portion (42) to abut against the limiting surface (16), and the clamping portion (41) is separated from the clamping slot (212).

7. The electric tool according to claim 1, wherein: The locking member (22) comprises a button portion (222) for pressing and a locking tongue portion (221) for abutting against the abutting portion (42).

8. The electric tool according to claim 1, wherein: A second elastic member (23) is mounted on the housing (21), and the second elastic member (23) is held between the locking member (22) and the housing (21). In the locked state, the locking member (22) abuts against the abutting portion (42) under the action of the second elastic member (23); the elastic restoring force of the second elastic member (23) is greater than the elastic restoring force of the first elastic member (3).

9. The electric tool according to claim 1, wherein: The housing (21) has a through hole. In the locked state, the locking piece (22) protrudes out of the through hole and abuts against the abutting portion (42).

10. The electric tool according to claim 1, wherein The housing (1) is provided with a limiting hole (15) for accommodating the first elastic member (3).

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